The platform is not the issue. Competent engineering teams could blow this out of the water with a single threaded jquery web app.
I have to agree here but I would like to add: every single web app I have ever had to build or was part of building was heavily biased and towards adding more features and exorbitant amounts of tracking that me or the other engineers had to practically beg the product owners to do do perf optimisations or reduce technical debt that accumulates after a couple of years, even with lots of low hanging fruits to pick from.
Idk, Gmail got really slow too. Also how do they not have infinite scroll in 2026?
Why a team... give me a few days ;-)